The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 2024
Filed:
Sep. 18, 2020
Applicant:
Edwards Japan Limited, Chiba, JP;
Inventors:
Tooru Miwata, Chiba, JP;
Yoshiyuki Takai, Chiba, JP;
Assignee:
Edwards Japan Limited, Chiba, JP;
Primary Examiner:
Int. Cl.
CPC ...
F04D 19/04 (2006.01); F04D 29/053 (2006.01); F04D 29/10 (2006.01); F04D 29/58 (2006.01);
U.S. Cl.
CPC ...
F04D 19/042 (2013.01); F04D 29/053 (2013.01); F04D 29/102 (2013.01); F04D 29/584 (2013.01);
Abstract
A vacuum pump which suppresses occurrence of deposition caused by an exhaust gas is obtained. The vacuum pump includes: a pump portion including a shaft portion, a rotor disposed on an outer peripheral side of the shaft portion, and a stator disposed on the outer peripheral side of the rotor; a channel of the exhaust gas from the pump portion to an outlet port; and a shielding portion which suppresses contact of the exhaust gas with the shaft portion in the channel. Further, an end portion of the shielding portion has a surface opposed to the rotor.